<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator="/">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item><a href="/">权限管理</a></el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图 -->
    <el-card>
      <!-- 添加角色按钮区域 -->
      <el-row>
        <el-col>
          <el-button type="primary" @click='addDialogVisible=true'>添加角色</el-button>
        </el-col>
      </el-row>
      <!-- 角色列表区域 -->
      <el-table   :data="rolelist" border stripe="">
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row 
              :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']"
              v-for="(item1, i1) in scope.row.children"
              :key="item1.id"
            >
              <!-- 渲染一级权限 -->
              <el-col
                :span="5"
                closable
                @close="removeRightById(scope.row, item1.id)"
              >
                <el-tag type="">{{ item1.authName }}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二级和三级权限 -->
              <el-col :span="19">
                <!-- 通过for循环嵌套渲染二级权限 -->
                <el-row
                  :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']"
                  v-for="(item2, i2) in item1.children"
                  :key="item2.id"
                >
                  <el-col :span="6">
                    <el-tag
                      type="success"
                      closable
                      @close="removeRightById(scope.row, item2.id)"
                      >{{ item2.authName }}</el-tag
                    >
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag
                      type="warning"
                      v-for="(item3) in item2.children"
                      :key="item3.id"
                      closable
                      @close="removeRightById(scope.row, item3.id)"
                    >
                      {{ item3.authName }}
                    </el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index" label="#"> </el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="350px">
          <template slot-scope="scope">
         
            <el-button type="danger" icon="el-icon-delete" size="mini" @click='removeUserById(scope.row.id)'
              >删除</el-button
            >
            <el-button
              type="warning"
              icon="el-icon-setting"
              size="mini"
              @click="showSetRightDialog(scope.row)"
              >分配权限</el-button
            >
          </template>
        </el-table-column>
      </el-table>
    </el-card>


    
    <!-- 添加用户的对话框 -->
    <el-dialog
      title="添加角色"
      :visible.sync="addDialogVisible"
      width="50%"
      @close="addDialogColsed"
    >
      <!-- 内容主题区域 -->
      <el-form
        :model="addForm"
        :rules="addFormRules"
        ref="addFormRef"
        label-width="70px"
      >
        <el-form-item label="名称" prop="roleName">
          <el-input v-model="addForm.roleName"></el-input>
        </el-form-item>

        <el-form-item label="描述" prop="RoleDesc">
          <el-input v-model="addForm.RoleDesc"></el-input>
        </el-form-item>
      </el-form>
      <!-- 底部区域 -->
      <span slot="footer" class="dialog-footer">
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addUser">确 定</el-button>
      </span>
    </el-dialog>


    <!-- //分配权限的对话框 -->
    <el-dialog
      title="分配权限对话框"
      :visible.sync="setRightDialogVisible"
      width="50%"
      @close='setRightDialogClosed'
    >
     <!-- 树形控件 -->
     <el-tree :data="rightsList" :props="treeProps" show-checkbox node-key='id' 
     :default-checked-keys='defKeys'	ref='treeRef'
     default-expand-all >

     </el-tree>

      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button
        >
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
        //所有角色列表
      rolelist: [],
      //默认分配权限对话框隐藏
      setRightDialogVisible:false,
      //所有权限的数据
      rightsList:[],
      //树形控件的绑定对象
      treeProps:{
          label:'authName',
          children:'children'
      },
      //默认选中的结点id值数组
      defKeys:[],
      //当前即将分配权限的角色id
      roleId:'',
      //控制添加角色对话框的显示与隐藏
      addDialogVisible:false,
      //添加角色的表单数据
      addForm:{
        roleName:'',
        roleDesc:''
      },
      //添加表单的验证规则对象
      addFormRules:{
           roleName:[
             {required: true, message:'请输入角色名称！', trigger: 'blur'}
           ]
      }
    };
  },
  created() {
    this.getRolesList();
  },
  methods: {
    //获取所有角色的列表
    async getRolesList() {
      const { data: res } = await this.$http.get("roles");
      if (res.meta.status !== 200) {
        return this.$message.error("获取角色列表失败");
      }
      this.rolelist = res.data;
    this.$message.success('获取角色列表成功!')
      console.log(this.rolelist);
    },
    //根据id删除对应的权限
    async removeRightById(role, rightId) {
      //弹框提示用户是否删除
      const confirmResult = await this.$confirm(
        "此操作将永久删除该文件, 是否继续?",
        "提示",
        {
          confirmButtonText: "确定",
          cancelButtonText: "取消",
          type: "warning",
        }
      ).catch((err) => err);
      if (confirmResult !== "confirm") {
        return this.$message.success("已取消了删除");
      }
      const { data: res } = await this.$http.delete(
        `roles/${role.id}/rights/${rightId}`
      );
      if (res.meta.status !== 200) {
        return this.$message.error("删除权限失败！");
      }
      // this.getRolesList()      =>会刷新页面
      role.children = res.data;
      this.$message.success("成功删除该权限!");
    },
    //展示分配权限的对话框
    async showSetRightDialog(role) {
        //获取所有权限的数据
        this.roleId=role.id
        const {data:res}= await this.$http.get('rights/tree')
        if(res.meta.status!==200)
        {
            return this.$message.error('获取权限数据失败')
        }
        //把获取到的权限数据保存到data中
        this.rightsList=res.data
        console.log(this.rightsList)

             //递归获取三级结点的id
             this.getLeafKeys(role,this.defKeys)

        this.setRightDialogVisible=true
    },
    //通过递归的形式，获取角色下所有三级权限的id,并保存到defKeys数组中
    getLeafKeys(node,arr){
        //如果当前结点不包含children属性，则是三级结点
          if(!node.children){
              return arr.push(node.id)
          }

          node.children.forEach(item=>this.getLeafKeys(item,arr))
    },
    //监听分配权限对话框的关闭时间
    setRightDialogClosed(){
            this.defKeys=[]
    },
    //点击为角色分配权限
   async allotRights(){
            const keys=[
                ...this.$refs.treeRef.
                getCheckedKeys(),
                    ...this.$refs.treeRef.
                    getHalfCheckedKeys()
            ]

            const idStr=keys.join(',')
       const {data:res} =  await  this.$http.post(`roles/${this.roleId}/rights`,{rids:idStr})
       if(res.meta.status!==200)  return this.$message.error('分配权限失败')
       this.$message.success('分配权限成功')
       this.getRolesList()
       this.setRightDialogVisible=false
    },
    //点击按钮删除用户信息
   async  removeUserById(id){
      const confirmResult= await  this.$confirm(
        "此操作将会永久删除用户，是否继续？",
        "提示",
        {
          confirmButtonText:'确定',
          cancelButtonText:'取消',
          type:"warning",
        }
      ).catch((err)=>{
        return err;
      });

      if (confirmResult !== "confirm") {
        return this.$message.info("已取消删除");
      }

      const { data: res } = await this.$http.delete("roles/" + id);
      if (res.meta.status !== 200) {
        return this.$message.error("删除用户信息失败!");
      }

      this.$message.success("已成功删除该角色信息");
       this.getRolesList();

    },

    //监听添加角色用户关闭的时间
    addDialogColsed(){
      this.$refs.addFormRef.resetFields();
    },
     //点击按钮，添加新用户
    addUser() {
      this.$refs.addFormRef.validate(async (valid) => {
        if (!valid) return;
        //可以发起用户的网络请求
        const { data: res } = await this.$http.post("roles", this.addForm);
        if (res.meta.status !== 201) return this.$message.error("添加角色失败!");
        //隐藏添加的对话框
        this.addDialogVisible = false;
        this.$message.success("添加角色成功!");
        //重新刷新角色列表
        this.getRolesList()
      });
    },

  },
};
</script>

<style lang="less" scoped>
.bdtop {
  border-top: 1px solid #eee;
}

.bdbottom {
  border-bottom: 1px solid #eee;
}
.vcenter {
  display: flex;
  align-items: center;
}
</style>